Answer :
Final answer:
The EMP pathway (or glycolysis) results in the production of NADH. The ED pathway may produce either NADH or NADPH, depending on the organism. The PPP pathway (Pentose Phosphate Pathway) results in the production of NADPH only. However, none of the provided options in the question fully align with this analysis.
A) EMP pathway: Only NADH; ED pathway: Both NADH and NADPH; PPP pathway: Only NADPH
Explanation:
The metabolic pathways that produce NADH, NADPH or both as a result of glucose metabolism include the Embden-Meyerhof-Parnas (EMP) pathway, the Entner-Doudoroff (ED) pathway, and the Pentose Phosphate Pathway (PPP).
The EMP pathway, also known as glycolysis, is the most common pathway in both animals and microbes. This pathway oxidizes glucose to pyruvate, producing two molecules of NADH. Therefore, the EMP pathway produces only NADH.
The ED pathway is an alternative glycolytic pathway used by some prokaryotes. It is a less common type of glycolysis pathway used mainly by certain bacteria, and details of NADH or NADPH production in this pathway are not provided within the given information. However, typically, NADPH is generated in pathways where there's a metabolic need for reduction reactions, whereas NADH is commonly involved in energy-yielding metabolism.
Lastly, the PPP pathway, also known as the phosphogluconate pathway or the hexose monophosphate shunt, is a metabolic pathway parallel to glycolysis. In this pathway, NADPH is generated, making it a source of only NADPH.
So, based on this analysis, the answer would be 'EMP pathway: Only NADH; ED pathway: NADH or NADPH depending on the organism; PPP pathway: Only NADPH'. However, the exact categories provided in the question don't quite match this conclusion exactly. Therefore, it might be best to conclude 'None of the above' given the options provided in the question.
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